From the record
“Wapiti Ranger Station is a ranger station in Shoshone National Forest west of Cody, Wyoming, United States. The station, the oldest in the United States Forest Service, has been used continuously since it was built in 1903.”
Wikipedia article Wapiti Ranger Station, CC BY-SA 4.0.
One of 38 National Register listings published here for Park County · listed in 1966 · category: Building · a National Historic Landmark.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service